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Lock-Nuts & O-Rings

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ElecDirect offers a full line of locking nuts, o-rings and sealing washers for cord grips and strain relief connectors.

Lock-Nuts are available in a variety of materials including nylon, steel, brass, and stainless steel. Choose from our huge selection of thread types in NPT, Metric, and PG.


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TypeThread Type
Items in the list: 67
SKU Product Name Specs Price U/M Qty
LN-38 LOCK-NUT METAL 3/8" NPT PDF $0.19 EA
LN-50 LOCK-NUT METAL 1/2" NPT PDF $0.16 EA
LN-75 LOCK-NUT METAL 3/4" NPT PDF $0.19 EA
LN-100 LOCK-NUT METAL 1" NPT PDF $0.31 EA
LN-125 LOCK-NUT METAL 1-1/4" NPT PDF $0.36 EA
LN-150 LOCK-NUT METAL 1-1/2" NPT PDF $0.43 EA
LN-200 LOCK-NUT METAL 2" NPT PDF $0.92 EA
LN-250 LOCK-NUT METAL 2.5" NPT PDF $1.87 EA
LN-300 LOCK-NUT METAL 3" NPT PDF $2.04 EA
NN-09-GR LOCK NUT NYLON 3/8" NPT GRAY $0.19 EA
NN-09-BK LOCK NUT NYLON 3/8" NPT PDF $0.19 EA
NN-13-BK LOCK NUT NYLON 1/2" NPT PDF $0.19 EA
Gray Lock Nut NN-13-GR LOCK NUT NYLON GRAY 1/2" NPT PDF $0.19 EA
NN-21-BK LOCK NUT NYLON 3/4" NPT PDF $0.27 EA
NN-21-GR LOCK NUT NYLON GRAY NPT 3/4" PDF $0.34 EA
NN-29-BK LOCK NUT NYLON 1" NPT PDF $0.50 EA
NN-29-GR LOCK-NUT NYLON GRAY 1" NPT $0.50 EA
NM-12-BK LOCK NUT NYLON M12 PDF $0.07 EA
NM-16-BK LOCK NUT NYLON M16 PDF $0.11 EA
NM-20-BK LOCK NUT NYLON M20 PDF $0.12 EA
NM-25-BK LOCK NUT NYLON M25 PDF $0.20 EA
NM-32-BK LOCK NUT NYLON M32 PDF $0.21 EA
NM-40-BK LOCK NUT NYLON M40 PDF $0.50 EA
NM-50-BK LOCK NUT NYLON M50 PDF $0.75 EA
NP-07-BK LOCK NUT NYLON PG-7 PDF $0.11 EA
NP-09-BK LOCK NUT NYLON PG-9 PDF $0.14 EA
NP-11-BK LOCK NUT NYLON PG-11 PDF $0.10 EA
NP-13-BK LOCK NUT NYLON PG-13 PDF $0.11 EA
NP-13-GR LOCK NUT NYLON PG-13, GRAY PDF $0.11 EA
NP-16-BK LOCK NUT NYLON PG-16 PDF $0.14 EA
NP-21-BK LOCK NUT NYLON PG-21 PDF $0.19 EA
NP-29-BK LOCK NUT NYLON PG-29 PDF $0.34 EA
NP-36-BK LOCK NUT NYLON PG-36 PDF $0.52 EA
NP-42-BK LOCK NUT NYLON Pg42 BLACK PDF $1.06 EA
NP-48-BK LOCK NUT NYLON Pg48 BLACK PDF $1.16 EA
NN-09-BR LOCK NUT BRASS NPT 3/8" PDF $2.25 EA
NN-13-BR LOCK NUT BRASS NPT 1/2" PDF $2.70 EA
NN-21-BR LOCK NUT BRASS NPT 3/4" PDF $3.38 EA
NM-12-BR LOCK NUT BRASS M12 PDF $0.34 EA
NM-16-BR LOCK NUT BRASS M16 PDF $0.36 EA
NM-20-BR LOCK NUT BRASS M20 PDF $0.38 EA
NM-25-BR LOCK NUT BRASS M25 PDF $0.69 EA
NM-32-BR LOCK NUT BRASS M32 PDF $1.02 EA
NM-40-BR LOCK NUT BRASS M40 PDF $1.77 EA
NM-50-BR LOCK NUT BRASS M50 PDF $4.78 EA
NP-07-BR LOCK NUT BRASS PG-7 PDF $0.18 EA
NP-09-BR LOCK NUT BRASS PG-9 PDF $0.16 EA
NP-11-BR LOCK NUT BRASS PG-11 PDF $0.20 EA
NP-13-BR LOCK NUT BRASS PG-13 PDF $0.22 EA
NP-16-BR LOCK NUT BRASS PG-16 PDF $0.25 EA
NP-21-BR LOCK NUT BRASS PG-21 PDF $0.41 EA
NP-29-BR LOCK NUT BRASS PG-29 PDF $0.65 EA
NP-36-BR LOCK NUT BRASS PG-36 PDF $1.05 EA
SL1 LOCK-NUT ZINC PLATED WITH PVC MOLDED GASKET 1/2" NPT $0.46 EA
LNSS-38 LOCK-NUT, STAINLESS STEEL, 3/8" PDF $3.70 EA
LNSS-75 LOCK-NUT, STAINLESS STEEL, 3/4" PDF $7.93 EA
LNSS-100 LOCK-NUT, STAINLESS STEEL, 1" $25.16 EA
SOR-38 O-RING 3/8" NPT PDF $0.06 EA
SOR-1-VNT O-RING 1/2" NPT PDF $0.06 EA
SOR-2 O-RING 3/4" NPT PDF $0.08 EA
heyco 3261 3261 SEALING WASHER FOR 3/4" NPT PDF $0.57 EA
SOR-3 O-RING 1" NPT PDF $0.09 EA
SOR-4 O-RING 1-1/4" NPT PDF $0.45 EA
SOR-51 O-RING 1-1/2" NPT PDF $0.36 EA
SOR-16 O-RING 2" NPT PDF $0.43 EA
SOR-PG-29 O-RING PG 29 PDF $0.72 EA
3260 SEALING WASHER 1/2" $0.49 EA