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		                        | National Stock Number:
 5331-99-101-7890
 
 Federal Supply Class:
 5331
 
 National Item Identification Number:
 991017890
 
 Description:
 O-RING
 
 Detail:
 A nonmetallic circular item with an aperature, having a solid round cross-section. They are used primarily for sealing. For items with other than round cross section, see PACKING,PREFORMED. For noncircular items with a round cross-section, see SEAL,NONMETALLIC ROUND SECTION and RUBBER,ROUND SECTION.
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 Manufacturer Information:
 
 | 100-240-0270 | U1068 | TRELLEBORG SEALING SOLUTIONS (UK)LTD |  | 17-27B | 99237 | AIRFORCE-NAVY AERONAUTICAL DESIGN STANDARD |  | BS1806-240 | K7766 | BRITISH STANDARDS INSTITUTION |  | BSM48-240 | K7766 | BRITISH STANDARDS INSTITUTION |  | SP901B18 | U1068 | TRELLEBORG SEALING SOLUTIONS (UK)LTD | 
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 Techincal Specification:
 
 | CENTER HOLE DIAMETER | 3.706 INCHES MINIMUM AND 3.762 INCHES MAXIMUM |  | COLOR | BLACK |  | CROSS-SECTIONAL HEIGHT | 0.139 INCHES NOMINAL |  | HARDNESS RATING | 66.0 INTERNATIONAL RUBBER HARDNESS DEGREE SCALE MINIMUM AND 77.0 INTERNATIONAL RUBBER HARDNESS DEGREE SCALE MAXIMUM |  | MATERIAL DOCUMENT AND CLASSIFICATION | DOWTY SEALS LTD, 0270 MFR REF SINGLE MATERIAL RESPONSE |  | MATERIAL | RUBBER | 
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