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9557M31P01 — PIN,STRAIGHT,HEADED

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

9557M31P01: PIN,STRAIGHT,HEADED.

The PIN,STRAIGHT,HEADED is a the manufacturer industrial component. Key specifications include height: 0.055 INCHES MINIMUM AND 0.065 INCHES MAXIMUM IN, diameter: 0.228 INCHES MINIMUM AND 0.272 INCHES MAXIMUM IN, material: COBALT COMP L-605 OVERALL, head_style: ROUND W/WRENCH FLATS, chamfer_length: 0.020 INCHES MINIMUM AND 0.040 INCHES MAXIMUM IN, special_features: SHANK HAS THROUGH HOLE. This part is cataloged in the U.S.

Government catalog under NSN 5315-01-272-0068, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
9557M31P01
NSN: 5315-01-272-0068
FSC: 5315 — Nails, Machine Keys, and Pins
CAGE: 07482 — GENERAL ELECTRIC COMPANY (USA)
SPECIFICATIONS
height0.055 INCHES MINIMUM AND 0.065 INCHES MAXIMUM IN
diameter0.228 INCHES MINIMUM AND 0.272 INCHES MAXIMUM IN
materialCOBALT COMP L-605 OVERALL
head_styleROUND W/WRENCH FLATS
chamfer_length0.020 INCHES MINIMUM AND 0.040 INCHES MAXIMUM IN
special_featuresSHANK HAS THROUGH HOLE
style_designatorSTRAIGHT
pin_chamfer_angle45.0 DEGREES NOMINAL
pin_head_diameter0.400 INCHES MINIMUM AND 0.420 INCHES MAXIMUM IN
under_head_length0.500 INCHES MINIMUM AND 0.520 INCHES MAXIMUM IN
width_across_flats0.290 INCHES MINIMUM AND 0.310 INCHES MAXIMUM IN
NSN5315-01-272-0068
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 9557M31P01 · OEM ⚠ VERIFY BEFORE ORDERING Grade matters for torque spec — don't mix grades. A Grade 5 nut on a Grade 8 bolt weakens the joint. Lock nuts, wing nuts, and castle nuts are NOT interchangeable with standard hex ✓ BROKER TIP Match nut to bolt thread class and material. Stainless bolt + zinc nut = galvanic corrosion. Always verify finish matches (plain, zinc, hot-dip galvanized) PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
WIDTH ACROSS FLATS: 0.290 INCHES MINIMUM AND 0.310 INCHES MAXIMUM IN
•
CHAMFER LENGTH: 0.020 INCHES MINIMUM AND 0.040 INCHES MAXIMUM IN
•
UNDER HEAD LENGTH: 0.500 INCHES MINIMUM AND 0.520 INCHES MAXIMUM IN
•
PIN CHAMFER ANGLE: 45.0 DEGREES NOMINAL
•
STYLE DESIGNATOR: STRAIGHT
•
PIN HEAD DIAMETER: 0.400 INCHES MINIMUM AND 0.420 INCHES MAXIMUM IN
•
DIAMETER: 0.228 INCHES MINIMUM AND 0.272 INCHES MAXIMUM IN
•
HEAD STYLE: ROUND W/WRENCH FLATS
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS0.290 INCHES MINIMUM AND 0.310 INCHES MAXIMUM IN
CHAMFER LENGTH0.020 INCHES MINIMUM AND 0.040 INCHES MAXIMUM IN
UNDER HEAD LENGTH0.500 INCHES MINIMUM AND 0.520 INCHES MAXIMUM IN
PIN CHAMFER ANGLE45.0 DEGREES NOMINAL
STYLE DESIGNATORSTRAIGHT
PIN HEAD DIAMETER0.400 INCHES MINIMUM AND 0.420 INCHES MAXIMUM IN
DIAMETER0.228 INCHES MINIMUM AND 0.272 INCHES MAXIMUM IN
HEAD STYLEROUND W/WRENCH FLATS
HEIGHT0.055 INCHES MINIMUM AND 0.065 INCHES MAXIMUM IN
SPECIAL FEATURESSHANK HAS THROUGH HOLE
OTHER ITEMS IN FSC 5315 — Nails, Machine Keys, and Pins
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5315-00-000-1037 5315-00-000-1067 5315-00-000-1245 5315-00-000-1372 5315-00-000-1412 5315-00-001-1571 5315-00-001-1572 5315-00-001-1602
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 9557M31P01?
9557M31P01 is a PIN,STRAIGHT,HEADED.
What is the NSN for 9557M31P01?
9557M31P01 is cataloged in the U.S. Government catalog under NSN 5315-01-272-0068. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.