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Technical Data Sheet
PartsTable / COMPONENT / 8438578
8438578 ✓ Verified by PartsTable
— · NUT WASHER
WHAT YOU NEED TO KNOW
Match nut grade to bolt grade for full strength Lock nuts prevent loosening under vibration
Don't mix grades — weakens the joint
PRODUCT OVERVIEW

The PIN,STRAIGHT,HEADED is a the manufacturer industrial component. Key specifications include height: 0.190 INCHES MINIMUM AND 0.310 INCHES MAXIMUM IN, diameter: 0.747 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN, material: STEEL COMP 1041 OR STEEL COMP 1137 OVERALL, head_style: PAN NO. 2 (R1 NOT REQUIRED IN ITEM DESCRIPTION), chamfer_length: 0.030 INCHES MINIMUM AND 0.090 INCHES MAXIMUM IN, hardness_rating: 18.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL.

This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-00-455-6884, 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
8438578
NSN: 5315-00-455-6884
FSC: 5315
CAGE: 19207 — U S ARMY TANK AUTOMOTIVE COMMAND AMSTA-IM-MM (USA)
SPECIFICATIONS
height0.190 INCHES MINIMUM AND 0.310 INCHES MAXIMUM IN
diameter0.747 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN
materialSTEEL COMP 1041 OR STEEL COMP 1137 OVERALL
head_stylePAN NO. 2 (R1 NOT REQUIRED IN ITEM DESCRIPTION)
chamfer_length0.030 INCHES MINIMUM AND 0.090 INCHES MAXIMUM IN
hardness_rating18.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL
style_designatorSTRAIGHT
pin_chamfer_angle45.0 DEGREES NOMINAL
pin_head_diameter0.910 INCHES MINIMUM AND 0.970 INCHES MAXIMUM IN
surface_treatmentCADMIUM OVERALL
under_head_length4.850 INCHES MINIMUM AND 4.910 INCHES MAXIMUM IN
first_hole_diameter0.172 INCHES NOMINAL IN
NSN5315-00-455-6884
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 8438578 · 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
•
FIRST HOLE DIAMETER: 0.172 INCHES NOMINAL IN
•
CHAMFER LENGTH: 0.030 INCHES MINIMUM AND 0.090 INCHES MAXIMUM IN
•
SURFACE TREATMENT: CADMIUM OVERALL
•
DIAMETER: 0.747 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416,TY 2,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
HOLE ARRANGEMENT STYLE: ONE END DRILLED
•
HEAD STYLE: PAN NO. 2 (R1 NOT REQUIRED IN ITEM DESCRIPTION)
•
UNDER HEAD LENGTH: 4.850 INCHES MINIMUM AND 4.910 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
FIRST HOLE DIAMETER0.172 INCHES NOMINAL IN
CHAMFER LENGTH0.030 INCHES MINIMUM AND 0.090 INCHES MAXIMUM IN
SURFACE TREATMENTCADMIUM OVERALL
DIAMETER0.747 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TY 2,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
HOLE ARRANGEMENT STYLEONE END DRILLED
HEAD STYLEPAN NO. 2 (R1 NOT REQUIRED IN ITEM DESCRIPTION)
UNDER HEAD LENGTH4.850 INCHES MINIMUM AND 4.910 INCHES MAXIMUM IN
PIN CHAMFER ANGLE45.0 DEGREES NOMINAL
DISTANCE FROM CENTERLINE OF HOLE TO END OF PIN0.260 INCHES MINIMUM AND 0.320 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
00944512000Interchangeable
interchangeable cross-reference
interchangeable
9-44512Interchangeable
interchangeable cross-reference
interchangeable
44512Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 8438578?
8438578 is a PIN,STRAIGHT,HEADED.
What parts can replace 8438578?
There are 3 known substitutes for 8438578: 00944512000, 9-44512, 44512. Substitute compatibility should be verified for your specific system.
What is the NSN for 8438578?
8438578 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-00-455-6884. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026