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81533 — PIPE,EXHAUST

✓ Government record, cited
Silverlit · NUT WASHER
PRODUCT OVERVIEW

81533: PIPE,EXHAUST.

The PIPE,EXHAUST is a Silverlit industrial component. Key specifications include design_form: PREBENT, usage_location: EXHAUST PIPE. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-081-6170, 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
81533
NSN: 5310-01-081-6170
NIINs: 010816170, 011033208
FSC: 5310 — Nuts and Washers
CAGE: 95019 — DANA CORP SPICER TRANSMISSION DIV (USA)
SPECIFICATIONS
design_formPREBENT
usage_locationEXHAUST PIPE
NSN5310-01-081-6170
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 81533 · Silverlit ⚠ 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
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DISTANCE ACROSS SPLIT OPENING: 0.060 INCHES MAXIMUM0.060 INCHES MAXIMUM IN
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HARDNESS RATING: 40.0 ROCKWELL B MINIMUM AND 40.0 ROCKWELL B MINIMUM AND 85.0 ROCKWELL B MAXIMUM85.0 ROCKWELL B MAXIMUM
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STYLE DESIGNATOR: SPLIT
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MATERIAL DOCUMENT AND CLASSIFICATION: SAE ASSN STD ALL MATERIAL RESPONSES OVERALL
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OUTSIDE DIAMETER: 3.500 INCHES NOMINAL3.500 INCHES NOMINAL IN
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MATERIAL THICKNESS: 0.046 INCHES MINIMUM AND 0.046 INCHES MINIMUM AND 0.056 INCHES MAXIMUM0.056 INCHES MAXIMUM IN
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MATERIAL: STEEL COMP 1008 OR STEEL COMP 1010 OVERALL
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HOLE DIAMETER: 2.560 INCHES NOMINAL2.560 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
DISTANCE ACROSS SPLIT OPENING0.060 INCHES MAXIMUM0.060 INCHES MAXIMUM IN
HARDNESS RATING40.0 ROCKWELL B MINIMUM AND 40.0 ROCKWELL B MINIMUM AND 85.0 ROCKWELL B MAXIMUM85.0 ROCKWELL B MAXIMUM
STYLE DESIGNATORSPLIT
MATERIAL DOCUMENT AND CLASSIFICATIONSAE ASSN STD ALL MATERIAL RESPONSES OVERALL
OUTSIDE DIAMETER3.500 INCHES NOMINAL3.500 INCHES NOMINAL IN
MATERIAL THICKNESS0.046 INCHES MINIMUM AND 0.046 INCHES MINIMUM AND 0.056 INCHES MAXIMUM0.056 INCHES MAXIMUM IN
MATERIALSTEEL COMP 1008 OR STEEL COMP 1010 OVERALL
HOLE DIAMETER2.560 INCHES NOMINAL2.560 INCHES NOMINAL IN
SUBSTITUTES & CROSS-REFERENCES 1
18DS101Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
Manufacturer release date (catalog record)2019-01-01
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 81533?
81533 is a PIPE,EXHAUST manufactured by Silverlit.
What parts can replace 81533?
There is 1 known substitute for 81533: 18DS101. Substitute compatibility should be verified for your specific system.
What is the NSN for 81533?
81533 is cataloged in the U.S. Government catalog under NSN 5310-01-081-6170. 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.