5305-01-220-6497

Description: Close Tolerance Screw

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We are commited to quality and satisfaction as a certified supplier in the aerospace and military industries.

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MILSPEC: MIL-S-8837

 Export Restrictions

Any part(s) quoted or sold by MilSpec.parts and re-sold (to a third party) CANNOT be sold to a USA embargoed country, company, entity, or person(s). Depending on the ECCN, these commodities may require export license or exception. Diversion contrary to U.S. law is prohibited. Unless otherwise noted, this sale, order or quote may include Munitions List Items (MLI) or Commerce Controlled List Items (CCLI). MLI/CCLI property is controlled by the US Government and in many cases cannot be transferred (exported, sold or given) to a foreign country, a non-US Citizen/National or a non- Permanent US Resident without a valid State/Commerce Department export authorization. It is the responsibility of (the Purchaser) to determine what the applicable requirements may be, to obtain all necessary authorizations, licenses or approvals and are subject to both review and acceptance by MilSpec.parts. The use, disposition, export and re-export of the property covered or included in this sale, order or quote is subject to the provisions of law referenced in End-Use Certificate DLA form 1822, DEC 2001, including, but not limited to, the Arms Export Control Act (22 USC 2751 et seq.); Export Administration Act of 1979 (50 USC App. 2401 et seq.) as contained under Executive Order 12924; International Traffic in Arms Regulations (22 CFR 120 et seq.); Export Administration Regulations (15 CFR 730 et seq.); Foreign Assets Control Regulations (31 CFR 500 et seq.) and the Espionage Act (18 USC 793 et seq.)

More MIL-S-8837 Parts

MIL-S-8837 Close Tolerance Screw

Spec. Type Spec. Color Gloss Size
Surface treatment document and classification MIL-S-8837

Array Properties

  • NSN:
    Array
  • Description:
    Close Tolerance Screw
  • Shelf Life:
    N/A
  • DEMIL:
    NO
  • UOM:
    1 EA
  • Thread Class:
    3a
  • Thread Direction:
    Right-hand
  • Thread Length:
    Between 0.386 inches and 0.453 inches
  • Fastener Length:
    Between 0.896 inches and 0.943 inches
  • Head Style:
    Flat countersunk
  • Head Diameter:
    Between 0.464 inches and 0.507 inches
  • Grip Diameter:
    Between 0.2485 inches and 0.2495 inches
  • Internal Drive Style:
    Offset cruciform (torque set)
  • Thread Diameter:
    0.250 inches
  • Grip Length:
    Between 0.490 inches and 0.510 inches
  • Thready Qty Per Inch (tpi):
    28
  • Min. Tensile Strength (psi):
    220000 pounds per square inch
  • Countersink Angle:
    Between 99.0 degrees and 101.0 degrees
  • Surface Finish:
    32.0 microinches threads
  • Part Name Assigned By Controlling Agency:
    Navy special project
  • Special Features:
    Internal drive ribbed
  • Material:
    Steel comp h11
  • Material Specification:
    Ams6487 assn standard single material response
  • Surface Treatment:
    Cadmium or cadmium and chromate
  • Surface Treatment Specification:
    Nas672 assn standard 1st treatment response or mil-s-8837, ty2, cl2 military specification 2nd treatment response
  • Thread Series Designator:
    Unjf
Manufacturers and Part Numbers
Part Number
Brand
SC1779-4-8
Arconic Global Fasteners & Rings
PBF1202-4-8
Sps Technologies
HR204-4-8
Naval Inventory Control Point
106706T-4-8
Sps Technologies
GB510CE4-8
Northrop Grumman Systems Corporation
Major Organizational Entities (MOE)
Entity
MOE Code
MOE Rule
PICA
DSOR
User:
DEPARTMENT OF THE NAVY Dept. of the Navy
MOE_CD:
DN
MOE_RL:
N9BZ
PICA:
GX
DSOR:
Part Identification
INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
29294
FIIG:
A003B0
Concept No.:
App. Key:
SS
Cond. Code:
1
Status:
A
Material and Special Handling
Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicators
HMIC
PMIC
ESD/EMI
ENAC
MMAC
CRITL
HMIC:
N
PMIC:
A
ESD:
ESD:
MMAC:
---
CRITL:
X
Hazmat (HMIC): N
Indicates there is no data in the hmirs and the nsn is in a fsc not generally suspected of containing hazardous materials.
Precious Metals (PMIC): A
Item does not contain precious metal.
Criticality (CRITL): X
The item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application.
Packaging and Dimensions
Package Size
Package Weight
Part Weight
Part Dimensions (approx.)
Pack Size:
--
Pack Weight:
--
Item Weight:
--
Item Dim:
--
Container
OPI
SPI No.
SPI Rev.
Container:
D3
OPI:
O
SPI No.:
SPI Rev.:
SPC Mkg.
LVL A
LVL B
LVL C
SPC Mkg.:
00
LVL A:
E
LVL B:
Q
LVL C:
CUSH
MOP
CATEG.
PRESS MAT
CUSH:
00
MOP:
10
CATEG.:
60ZZ
PRESS MAT:
00
WRAP MAT
ICQ
THK
TOS
UCL
WRAP MAT:
00
ICQ:
AAA
THK:
0
TOS:
UCL:
Packaging Code Definitions
LVL A Code (LVL_A):E
Packing shall be accomplished to meet the performance test requirements of astm-d4169, distribution cycle 18, assurance level 1.
LVL B Code (LVL_B): Q
Packing shall be accomplished in accordance with table c.Ii for the packing level specified. closure, sealing and reinforcement shall be in accordance with the appropriate shipping container specification.
Procedure Indicator Code (OPI): O
Options can be exercised as to specific method of preservation or dod approved packaging materials to be used. however, basic preservation method shall be retained, supplemental data shall be complied with, and unit package dimensions shall not be increased by more than one inch. equal or better protection shall be given the item and there shall be no increase in the package cost.
Special Markings Code (SPC MKG): 00
No special marking.
Method of Preservation (MOP): 10
Physical protection.
Cushion Material (CUSH): 00
No requirement.
Preservation Material (PRESS MAT): 00
No requirement.