NSN 5305-01-081-1256 NIIN — Cap Socket Head Screw

National Stock number : 5305-01-081-1256

Cap Socket Head Screw


Available Quantity 3,127
Available Conditions NS NE
Classification Screws - FSC 5305
Schedule B 7318152000
Stock Check Date 01/21/2026
Part-Number.info Quality System
  •   ISO 9001:2015 + AS9120B Certifed
  •   Audited supply chain
  •   Counterfeit Parts Prevention
  •   100% Product Inspections
  •   7 Year Record Retention
  •   HAZMAT Certified
  •   ITAR and DDTC Registered
AS9120 Certified Supplier

Product Properties


Description

Cap Socket Head Screw

Thread Class

3a

Thread Direction

RIGHT-Hand

Thread Length

1.250 mm

Fastener Length

1.210in. and 1.250in. ⁓1-1/4"

Head Style

flat chamfer

Head Diameter

0.550in. and 0.562in.

Head Height

0.368in. and 0.375in. ⁓3/8"

Hole Diameter

0.061in. and 0.067in. ⁓5/64"

Internal Drive Style

hexagon

Nominal Thread Diameter

0.375in. ⁓3/8"

Width Across Flats

0.312in. and 0.316in. ⁓21/64"

Hole Quantity

6

Hole Type

drilled

Thread Quantity Per Inch

24

Hole Configuration Style

round internal hexagon

Material

iron alloy 660

Material Document And Classification

ams 5731 assn std single material response or ams 5737 assn std single material response

Surface Treatment

passivate

Surface Treatment Document And Classification

QQ-P-35 fed spec single treatment response

Thread Series Designator

unrf

Specification/standard Data

80205-NAS1351 professional/industrial association standard

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National Stock Number
5305-01-081-1256
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