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21-853 — RELAY,ELECTROMAGNETIC

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

21-853: RELAY,ELECTROMAGNETIC.

The RELAY,ELECTROMAGNETIC is a the manufacturer industrial component. Key specifications include material: RUBBER SYNTHETIC OVERALL, thickness: 0.125 INCHES NOMINAL IN, pattern_type: AMERICAN, face_cut_type: SINGLE CUT, BASTARD, hole_diameter: 0.688 INCHES NOMINAL IN, overall_length: 8.000 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-245-3572, 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
21-853
NSN: 5310-00-245-3572
NIINs: 002453572, 003475250, 003537547, 015181632, 016207011
FSC: 5310 — Nuts and Washers
CAGE: 06556 — GENERAL FIRE EXTINGUISHER CORP (USA)
SPECIFICATIONS
materialRUBBER SYNTHETIC OVERALL
thickness0.125 INCHES NOMINAL IN
pattern_typeAMERICAN
face_cut_typeSINGLE CUT, BASTARD
hole_diameter0.688 INCHES NOMINAL IN
overall_length8.000 INCHES NOMINAL IN
hardness_rating75.0 DUROMETER MINIMUM AND 85.0 DUROMETER MAXIMUM
overall_diameter1.062 INCHES NOMINAL IN
special_featuresALUMINUM ALLOY/A,SINGLE CYLINDER,AIR COOLED W/COOLING FINS OVER OUTER SURFACE; 7 MTG HOLES; THD SPARK PLUG HOLE; 6.500 IN. LG,4.688 IN. W,1.000 IN. O/A THK IN
style_designatorROUND TYPE
peripheral_shape_styleROUND
center_hole_shape_styleROUND
NSN5310-00-245-3572
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 21-853 · 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
•
OVERALL DIAMETER: 1.062 INCHES NOMINAL IN
•
HARDNESS RATING: 75.0 DUROMETER MINIMUM AND 85.0 DUROMETER MAXIMUM
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-STD-417,GRADE SB815 MIL STD SINGLE MATERIAL RESPONSE OVERALL
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CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
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PERIPHERAL SHAPE STYLE: ROUND
•
MATERIAL: RUBBER SYNTHETIC OVERALL
•
CENTER HOLE SHAPE STYLE: ROUND
•
HOLE DIAMETER: 0.688 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
OVERALL DIAMETER1.062 INCHES NOMINAL IN
HARDNESS RATING75.0 DUROMETER MINIMUM AND 85.0 DUROMETER MAXIMUM
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-STD-417,GRADE SB815 MIL STD SINGLE MATERIAL RESPONSE OVERALL
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
PERIPHERAL SHAPE STYLEROUND
MATERIALRUBBER SYNTHETIC OVERALL
CENTER HOLE SHAPE STYLEROUND
HOLE DIAMETER0.688 INCHES NOMINAL IN
THICKNESS0.125 INCHES NOMINAL IN
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 21-853?
21-853 is a RELAY,ELECTROMAGNETIC.
What is the NSN for 21-853?
21-853 is cataloged in the U.S. Government catalog under NSN 5310-00-245-3572. This indicates validated use in U.S. government and defense supply chains.
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