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31538 — PUMP,FUEL,METERING AND DISTRIBUT

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

31538: PUMP,FUEL,METERING AND DISTRIBUT.

PUMP,FUEL,METERING AND DISTRIBUT. Key specifications include hole_diameter: 0.218 INCHES NOMINAL IN, center_to_center_distance_between_bolt_holes_along_length: 1.000 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5315-00-291-2708, 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
31538
NSN: 5315-00-291-2708
NIINs: 002912708, 006088092, 009259862, 011093382, 011381094, 012683631, 013556028
FSC: 5315 — Nails, Machine Keys, and Pins
CAGE: 00198 — PRATT & WHITNEY CANADA CORP DIV PRATT & WHITNEY CANADA CORP. (CAN)
SPECIFICATIONS
hole_diameter0.218 INCHES NOMINAL IN
bolt_hole_quantity2
center_to_center_distance_between_bolt_holes_along_length1.000 INCHES NOMINAL IN
NSN5315-00-291-2708
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 31538 · 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 TAPER LENGTH: 0.021 INCHES MINIMUM AND 0.041 INCHES MAXIMUM IN
•
SECOND END TAPER ANGLE: 55.0 DEGREES MINIMUM AND 65.0 DEGREES MAXIMUM
•
FIRST END STYLE: CHAMFERED
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 5132 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
SECOND END TAPER LENGTH: 0.052 INCHES MINIMUM AND 0.072 INCHES MAXIMUM IN
•
FIRST END TAPER ANGLE: 40.0 DEGREES MINIMUM AND 50.0 DEGREES MAXIMUM
•
PIN OVERALL DIAMETER: 0.3115 INCHES MINIMUM AND 0.3125 INCHES MAXIMUM IN
•
PIN OVERALL LENGTH: 1.3025 INCHES MINIMUM AND 1.3225 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
FIRST END TAPER LENGTH0.021 INCHES MINIMUM AND 0.041 INCHES MAXIMUM IN
SECOND END TAPER ANGLE55.0 DEGREES MINIMUM AND 65.0 DEGREES MAXIMUM
FIRST END STYLECHAMFERED
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 5132 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
SECOND END TAPER LENGTH0.052 INCHES MINIMUM AND 0.072 INCHES MAXIMUM IN
FIRST END TAPER ANGLE40.0 DEGREES MINIMUM AND 50.0 DEGREES MAXIMUM
PIN OVERALL DIAMETER0.3115 INCHES MINIMUM AND 0.3125 INCHES MAXIMUM IN
PIN OVERALL LENGTH1.3025 INCHES MINIMUM AND 1.3225 INCHES MAXIMUM IN
SECOND END RELATIONSHIP WITH FIRST ENDNOT IDENTICAL
SECOND END STYLECHAMFERED
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 31538?
31538 is a PUMP,FUEL,METERING AND DISTRIBUT.
What is the NSN for 31538?
31538 is cataloged in the U.S. Government catalog under NSN 5315-00-291-2708. This indicates validated use in U.S. government and defense supply chains.
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