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548803 — SCREW,MACHINE

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

548803: SCREW,MACHINE.

The SCREW,MACHINE is a the manufacturer industrial component. Key specifications include head_style: FILLISTER, head_height: 0.036 INCHES NOMINAL IN, thread_class: 2A A, head_diameter: 0.140 INCHES NOMINAL IN, hole_diameter: 0.031 INCHES NOMINAL IN, thread_length: 0.406 INCHES MINIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5315-00-375-8337, 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
548803
NSN: 5315-00-375-8337
NIINs: 003758337, 009587758
FSC: 5315 — Nails, Machine Keys, and Pins
CAGE: 77068 — ALLIED-SIGNAL INC DBA ALLIED-SIGNAL AEROSPACE CO ELECTRODYNAMICS DIV (USA)
SPECIFICATIONS
head_styleFILLISTER
head_height0.036 INCHES NOMINAL IN
thread_class2A A
head_diameter0.140 INCHES NOMINAL IN
hole_diameter0.031 INCHES NOMINAL IN
hole_quantity1
thread_length0.406 INCHES MINIMUM IN
screw_materialSTEEL COMP 416F
fastener_length0.445 INCHES MAXIMUM IN
thread_directionRIGHT-HAND
internal_drive_styleCROSS RECESS TYPE 1
nominal_thread_diameter0.086 INCHES IN
NSN5315-00-375-8337
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 548803 · 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 END STYLE: SQUARE
•
HARDNESS RATING: 60.0 ROCKWELL C MINIMUM AND 64.0 ROCKWELL C MAXIMUM OVERALL
•
PIN OVERALL DIAMETER: 0.0780 INCHES NOMINAL IN
•
PIN OVERALL LENGTH: 2.297 INCHES NOMINAL IN
•
SECOND END RELATIONSHIP WITH FIRST END: IDENTICAL
•
MATERIAL: STEEL OVERALL
TECHNICAL CHARACTERISTICS
FIRST END STYLESQUARE
HARDNESS RATING60.0 ROCKWELL C MINIMUM AND 64.0 ROCKWELL C MAXIMUM OVERALL
PIN OVERALL DIAMETER0.0780 INCHES NOMINAL IN
PIN OVERALL LENGTH2.297 INCHES NOMINAL IN
SECOND END RELATIONSHIP WITH FIRST ENDIDENTICAL
MATERIALSTEEL OVERALL
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Semi-active item — no replacement plannedNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 548803?
548803 is a SCREW,MACHINE.
What is the NSN for 548803?
548803 is cataloged in the U.S. Government catalog under NSN 5315-00-375-8337. 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.