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12321951 — PIN,STRAIGHT,HEADED

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

12321951: PIN,STRAIGHT,HEADED.

The PIN,STRAIGHT,HEADED is a the manufacturer industrial component. Key specifications include height: 0.094 INCHES NOMINAL IN, diameter: 0.306 INCHES MINIMUM AND 0.311 INCHES MAXIMUM IN, material: STEEL COMP 4620 OR STEEL COMP 8620 OVERALL, head_style: FLAT CHAMFER, hardness_rating: 20.0 ROCKWELL C MINIMUM OVERALL, style_designator: STRAIGHT. This part is cataloged in the U.S.

Government catalog under NSN 5315-01-270-5494, 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
12321951
NSN: 5315-01-270-5494
FSC: 5315 — Nails, Machine Keys, and Pins
CAGE: 19207 — U S ARMY TANK AUTOMOTIVE COMMAND AMSTA-IM-MM (USA)
SPECIFICATIONS
height0.094 INCHES NOMINAL IN
diameter0.306 INCHES MINIMUM AND 0.311 INCHES MAXIMUM IN
materialSTEEL COMP 4620 OR STEEL COMP 8620 OVERALL
head_styleFLAT CHAMFER
hardness_rating20.0 ROCKWELL C MINIMUM OVERALL
style_designatorSTRAIGHT
features_providedCASEHARDENED
pin_head_diameter0.438 INCHES NOMINAL IN
surface_treatmentZINC OVERALL
under_head_length3.320 INCHES NOMINAL IN
first_hole_diameter0.104 INCHES MINIMUM AND 0.119 INCHES MAXIMUM IN
hole_arrangement_styleONE END DRILLED
NSN5315-01-270-5494
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 12321951 · 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
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: ASTM B633,TY2 SC3 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
•
HOLE ARRANGEMENT STYLE: ONE END DRILLED
•
UNDER HEAD LENGTH: 3.320 INCHES NOMINAL IN
•
FIRST HOLE DIAMETER: 0.104 INCHES MINIMUM AND 0.119 INCHES MAXIMUM IN
•
HARDNESS RATING: 20.0 ROCKWELL C MINIMUM OVERALL
•
STYLE DESIGNATOR: STRAIGHT
•
PIN HEAD DIAMETER: 0.438 INCHES NOMINAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM A331 ASSN STD ALL MATERIAL RESPONSES OR ASTM A322 ASSN STD ALL MATERIAL RESPONSES OR SAE ASSN STD ALL MATERIAL RESPONSES OVERALL
TECHNICAL CHARACTERISTICS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONASTM B633,TY2 SC3 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
HOLE ARRANGEMENT STYLEONE END DRILLED
UNDER HEAD LENGTH3.320 INCHES NOMINAL IN
FIRST HOLE DIAMETER0.104 INCHES MINIMUM AND 0.119 INCHES MAXIMUM IN
HARDNESS RATING20.0 ROCKWELL C MINIMUM OVERALL
STYLE DESIGNATORSTRAIGHT
PIN HEAD DIAMETER0.438 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A331 ASSN STD ALL MATERIAL RESPONSES OR ASTM A322 ASSN STD ALL MATERIAL RESPONSES OR SAE ASSN STD ALL MATERIAL RESPONSES OVERALL
DIAMETER0.306 INCHES MINIMUM AND 0.311 INCHES MAXIMUM IN
FEATURES PROVIDEDCASEHARDENED
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 1
5315012705494Reference document
Same NSN cross-reference
Reference document — Informative reference only
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 12321951?
12321951 is a PIN,STRAIGHT,HEADED.
What parts can replace 12321951?
There is 1 known substitute for 12321951: 5315012705494. Substitute compatibility should be verified for your specific system.
What is the NSN for 12321951?
12321951 is cataloged in the U.S. Government catalog under NSN 5315-01-270-5494. 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.